Cosmic-void observations reconciled with primordial magnetogenesis.
Journal
Nature communications
ISSN: 2041-1723
Titre abrégé: Nat Commun
Pays: England
ID NLM: 101528555
Informations de publication
Date de publication:
18 Nov 2023
18 Nov 2023
Historique:
received:
03
06
2022
accepted:
03
11
2023
medline:
19
11
2023
pubmed:
19
11
2023
entrez:
19
11
2023
Statut:
epublish
Résumé
It has been suggested that the weak magnetic field hosted by the intergalactic medium in cosmic voids could be a relic from the early Universe. However, accepted models of turbulent magnetohydrodynamic decay predict that the present-day strength of fields originally generated at the electroweak phase transition (EWPT) without parity violation would be too low to explain the observed scattering of γ-rays from TeV blazars. Here, we propose that the decay is mediated by magnetic reconnection and conserves the mean square fluctuation level of magnetic helicity. We find that the relic fields would be stronger by several orders of magnitude under this theory than was indicated by previous treatments, which restores the consistency of the EWPT-relic hypothesis with the observational constraints. Moreover, efficient EWPT magnetogenesis would produce relics at the strength required to resolve the Hubble tension via magnetic effects at recombination and seed galaxy-cluster fields close to their present-day strength.
Identifiants
pubmed: 37980408
doi: 10.1038/s41467-023-43258-3
pii: 10.1038/s41467-023-43258-3
pmc: PMC10657398
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
7523Informations de copyright
© 2023. The Author(s).
Références
Phys Rev Lett. 2010 Dec 3;105(23):235002
pubmed: 21231473
Phys Rev Lett. 2001 Dec 17;87(25):251302
pubmed: 11736556
Phys Rev Lett. 2003 Dec 19;91(25):251301
pubmed: 14754103
Phys Rev E. 2017 Nov;96(5-1):053105
pubmed: 29347643
Rep Prog Phys. 2021 Jun 17;84(7):
pubmed: 34015776
Phys Rev D Part Fields. 1996 Jul 15;54(2):1291-1300
pubmed: 10020806
Phys Rev Lett. 2019 Jul 12;123(2):021301
pubmed: 31386540
Rep Prog Phys. 2016 Jul;79(7):076901
pubmed: 27243368
Phys Rev Lett. 2016 Dec 2;117(23):235101
pubmed: 27982637
Phys Rev Lett. 2015 Feb 20;114(7):075001
pubmed: 25763960
Science. 2010 Apr 2;328(5974):73-5
pubmed: 20360103
Phys Rev Lett. 2020 Oct 30;125(18):181302
pubmed: 33196251
Phys Rev Lett. 1992 Mar 23;68(12):1803-1806
pubmed: 10045224